<template>
  <div>
    <!-- 面包写导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品 </el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示信息 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tabs选项卡 -->
      <el-form :model="addForm" :rules="addFormRules" :label-position="'top'" ref="addFormRef" label-width="100px">
        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeLeave" @tab-click="tabclicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number" min="0"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number" min="0"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number" min="0"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cate">
              <el-cascader
                v-model="addForm.selectKeys"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item v-for="item in manyTableData" :key="item.attr_id" :label="item.attr_name">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="item1" v-for="(item1, i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">商品图片</el-tab-pane>
          <el-tab-pane label="商品内容" name="4">商品内容</el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      activeIndex: '0',
      //   添加表单的数据
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        selectKeys: []
      },
      cateList: [],
      manyTableData: [],
      onlyTableData: [],
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        childern: 'children'
      },
      //   表单校验规则
      addFormRules: {
        goods_name: [{ required: true, message: '请输入商品名称', trigger: 'blur' }],
        goods_price: [{ required: true, message: '请输入商品价格', trigger: 'blur' }],
        goods_weight: [{ required: true, message: '请输入商品重量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_number: [{ required: true, message: '请输入商品数量', trigger: 'blur' }],
        goods_cate: [{ required: true, message: '请选择商品分类', trigger: 'blur' }]
      }
    }
  },
  methods: {
    //   获取级联数据
    async getGoodsfenleiList() {
      const { data: res } = await this.$http.get('categories')
      //   console.log(res)
      this.cateList = res.data
    },
    handleChange() {
      //   console.log(this.addForm.selectKeys)
      if (this.addForm.selectKeys.length !== 3) {
        this.addForm.selectKeys = []
        return
      }
    },
    beforeLeave(newv, oldv) {
      if (oldv === '0' && this.addForm.selectKeys.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    async tabclicked() {
      if (this.activeIndex == '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        console.log(res)
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数列表失败')
        }
        this.manyTableData = res.data
      } else if (this.activeIndex == '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数列表失败')
        }
        console.log(res.data)

        this.onlyTableData = res.data
      }
    }
  },
  created() {
    this.getGoodsfenleiList()
  },
  computed: {
    cateId() {
      if (this.addForm.selectKeys.length === 3) {
        return this.addForm.selectKeys[2]
      } else {
        return null
      }
    }
  }
}
</script>

<style lang="less" scoped>
.el-steps {
  margin: 15px 0;
}
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
</style>
